package priv.mill.duotai;

import java.util.Date;

public class ConstDemo {

	public static void main(String[] args) {
		final Person person = new Person();
		System.out.println(person.birthday);
//		person.birthday=new Date();
//		person=new Person();
		System.out.println(person.shengFenZheng);
		visitor(person);
		System.out.println(person.shengFenZheng);
	}

	private static void visitor(Person person) {
		person.shengFenZheng="22";
	}
}

 class Person{
	 String shengFenZheng="11111111111111111";
	final Date birthday=new Date();
	final void sayHi(){
		
	}
}
class BlackPerson extends Person{
//	void sayHi(){
//		
//	}
}

 interface look{
	final int scend=2;
}

